【Author】
Yin, Hao; Zhang, Zijian; He, Jialing; Ma, Liran; Zhu, Liehuang; Li, Meng; Khoussainov, Bakh
【Source】IEEE INTERNET OF THINGS JOURNAL
【Abstract】Bitcoin first proposed the Nakamoto consensus that applies proof of work into the blockchain structure to build a trustless append-only ledger. The Nakamoto consensus solves the distributed consistency problem in the public network but wastes too much computing power. Instead of consuming computing resources, many improved consensus schemes address this problem by leveraging miners' storage resources. However, these schemes fail to let miners store data constantly and usually rely on a dealer to assign data, which is hard to build a reliable decentralized storage system. In this article, we first design a variant consensus algorithm named Proof of Continuous Work (PoCW) with a storage-related incentive mechanism. Miners can accumulate mining advantage by continuously submitting proofs of storage. Then, we present a hash ring-based data allocation algorithm using the blockchain's state. Combined with both of them, we build a reliable blockchain-based storage system without relying on any third parties. The theoretical analysis and simulation results demonstrate that the proposed system has higher reliability than those existing systems, and we also give practical suggestions about system parameters. Finally, we discuss additional benefits that our system brings.
【Keywords】Blockchains; Resource management; Data mining; Internet of Things; Bitcoin; Servers; Reliability theory; Blockchain; data allocation; decentralized storage; Proof of Continuous Work (PoCW); reliability
【标题】在无许可区块链上可靠数据存储的持续工作证明
【摘要】比特币首先提出了中本聪共识，将工作量证明应用到区块链结构中，以构建一个无需信任的仅附加分类账。中本聪共识解决了公网中的分布式一致性问题，但是浪费了太多的算力。许多改进的共识方案不是消耗计算资源，而是通过利用矿工的存储资源来解决这个问题。然而，这些方案无法让矿工持续存储数据，通常依赖于经销商分配数据，难以构建可靠的去中心化存储系统。在本文中，我们首先设计了一种变体共识算法，名为 Proof of Continuous Work (PoCW)，具有存储相关的激励机制。矿工可以通过不断提交存储证明来积累挖矿优势。然后，我们提出了一种使用区块链状态的基于哈希环的数据分配算法。结合它们，我们构建了一个可靠的基于区块链的存储系统，而不依赖任何第三方。理论分析和仿真结果表明，所提出的系统比现有系统具有更高的可靠性，并对系统参数提出了实用的建议。最后，我们讨论了我们的系统带来的额外好处。
【关键词】区块链；资源管理;数据挖掘;物联网;比特币；服务器；可靠性理论；区块链；数据分配；分散存储；连续工作证明（PoCW）；可靠性
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